help explain water and the exhuast system

[yama-doo]

Ok I am getting ready to start back working on my ski project (seadoo hx, yamaha 1200 engine, riva red pipe exhuast) anyway some times when you have a idea of useing different then normal stuff in your application you just have to make custom parts in order to get it to work. I just need to under stand this a little better to know if my idea will work before I start fabercating parts

Here is the question I need explained to me. on a yamaha (or any) engine around the exhuast there are outter holes witch water normally comes out into the exhuast pipe system.........Can these be blocked off to run a dry pipe type exhuast? or do I need to vent this water to some where?

 

[jetskiking]

Dry pipes are jacketed through the whole pipe. the only parts that are jacketed on a wet pipe are the manifold and headpipe or the very first part of the chamber. So in short no you couldn't just block the holes. Not to say it couldn't be done and I actually think it has but you would have to jacket the wet pipe.

 

[SuperJETT]

Something else to think about, pipe design has less of an effect on a triple due to the exhaust pulses being only 120 degrees apart instead of 180. To get a serious increase, you have to go to triple pipes.

That Riva pipe may actually give less power than the oem pipe setup, but if it's what you need for clearance issues, then you gotta do what you gotta do.

 

[yama-doo]

jetskiing,
so I need to figure out where to vent that water, thanks

superjett,
it is more of a budget issue right now then anything if I had the cash I could buy a triple pipe or make one but am not sure if it would fit into the seadoo HX hull. I am trying to work with what I have an that limited my choices form one of these three :
1) seadoo OEM pipe
2) Rosser pipe
3) Riva Red pipe

any choice other then buying a factory pipe means I will have to fabercate a part to connect the intake to the pipe

 

[SUPERJET-113]

Put a Seadoo 800 engine in it. Many peeps do that and it's 110 HP stock and with a bit of bumped compression and a pipe it will be lighter and way more powerful than if you were to put a 1200 engine in there(and much easier).
Thats my suggestion.
I think with the 1200 modification, your going to have to a lot of clearance glass work on the hull too.
Sell that 1200 motor and find a SD 800 IMO.

 

[ski4]

Put a Seadoo 800 engine in it. Many peeps do that and it's 110 HP stock and with a bit of bumped compression and a pipe it will be lighter and way more powerful than if you were to put a 1200 engine in there(and much easier).
Thats my suggestion.
I think with the 1200 modification, your going to have to a lot of clearance glass work on the hull too.
Sell that 1200 motor and find a SD 800 IMO.

ditto a super motor in it's time

 

[yama-doo]

well Honestly I hate seadoo engines they just don't seem to hold up as well at least for me. and it fall back to budget I already have the yamaha 1200 and believe it or not it bolts right in once I change the mounts no glass work or clearnce problems with the engine, now the exhuast is challanging no matter witch I use

thanks everyone for the input

 

[Idok]

you see the post on the other site of the guy that just built the twin piped Hx?

 

[Boris]

Are you using a power valve 1200 on non PV ?

 

[yama-doo]

Boris,
it is a nonPV

Idok,
no witch site ?